In **Passive DF**, users locked OCEAN for veOCEAN. In **Active DF**, users allocated veOCEAN to curate data assets.
- veOCEAN, Passive DF, and Active DF were [retired](https://blog.oceanprotocol.com/passive-volume-data-farming-airdrop-has-completed-they-are-now-retired-6933520b5fcb) on May 3, 2024, alongside an an airdrop to veOCEAN holders.
- **veOCEAN holders can claim airdrop & past rewards at [df.oceandao.org/rewards](https://df.oceandao.org/rewards)**.
- The locked OCEAN will unlock according to its schedule (up to 4 years)
- [This article](https://blog.oceanprotocol.com/passive-volume-data-farming-airdrop-has-completed-they-are-now-retired-6933520b5fcb) has details.
In **Challenge DF**, users did weekly one-off predictions. It was [retired](https://blog.oceanprotocol.com/df62-completes-and-df63-launches-predictoor-df-is-here-081fc78ceb70) on Nov 30, 2023.
For further details, the ["Data Farming Series" article](https://blog.oceanprotocol.com/ocean-data-farming-series-c7922f1d0e45) chronicles week-by-week rewards and DF evolution.
## Future DF Streams
Potential DF evolution includes:
- Scaling up Predictoor DF rewards. [Details](https://blog.oceanprotocol.com/ocean-protocol-update-2024-e463bf855b03#4da0).
- New stream: run Unified Backend nodes. [Details](https://blog.oceanprotocol.com/ocean-protocol-update-2024-e463bf855b03#f779).
- New stream: decentralized model training for world-world models. [Details]([Details](https://blog.oceanprotocol.com/ocean-protocol-update-2024-e463bf855b03#4da0).)
- The [Ocean Data Farming Series](https://blog.oceanprotocol.com/ocean-data-farming-series-c7922f1d0e45) article has a chronological account of all Data Farming activities since its inception. It links to related blog posts.